Rotary drilling machine



March 6, 1928.

E. El GREVE RO-TARY DRILLING ACHINE Filed Aug: 3: 1926 .Fm. 4. J; I /7 k 2/ /a 6 r a a0 32 20 a Patented Mar. 6, 1928. y i

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Application nled' August 3, 1920. Serial No. 126,922.

My invention; relates to improvements in rotary drilling machines, and more particularly to the rotary table or the'drive-ring thereof and the cooperating drive members nested in the table or drive-ring and utilized for transmitting p'ow erfrjom the rotary t the drilling string.

- is to provide. simple "and eflicient'automati- I 1361- locking the rotary and the; cooperating The prime object of the present invention cally operable means table, drive or gearrl ng,

drive members-associated therewith,against relative vertical movement or vertical d1s 11. carried on a lacemcnt of the drive members. v A further object is to provide a construction permitting the said drive members to be locked against vertical displacement byfilli.) act of nesting or assembling thesaId-fmem Y 1 characterls'tlcfeature. of my invention.

bers. y I ,In the accompanying drawing,- wh h 11 trates an application of my n-wention,

Fig. 1 is a top plan view of a rotary drilling machine embodying my invention;.

Fig. 2, a vertical sectiohal viewtakenon line IIII of Fig. 1;

Fig. 3, a detail sectionalview particularly showing the locking 'meansffiin unlocked positi'on) for locking. a spider-to thetable or drive rings; and Fig. 4, a detail sectional view, the section being taken on line IV--IV of Fig. 1.

Referring'to the drawing, 5-designates a rotary table having a gear ring 6, the latter being adapted to be driven by a gear, not shown, mounted on an end of a driveshaft 7. 8 designates a drive" sprocket mounted on shaft 7, and 9 and 10 bearings for the table is mounted on bearings base portion 12, and is provided with a central bore or opening 13, as is usual. The table includes an annular depending member 14 having a threaded'lower end 15, the latter being designed to receive a thrust collar 16, whereby the table is main- The rotary tained in the desiredposition relatively. to

' the base 12.

- bushing mern Arranged within the central opening of drive ring, and adapted to cooperate therewith for driving the drlll string, are a plurality of nested drive membcrs, includin as illustrated, an outer sp der member or spider or bushing 18, and a divided drill stemengagin bushing 19. The splder or Tiers are each provided with opening.

'for engagement 23 of the bushing 17, and with latter being adapted to engage the outer flat parts are in driving relation, prevent relative vertical movement of the ,said drive-parts or vertical displacem'ent of V 1 the said members beingl einner bushing or ushing 17, an intermediate flat faces adapted for cooperation with flat faces formed-on the table or adjacent bushings. Thus, bushing 17 is formed vwith fiat contacting faces-2O adapted to engage corresponding faces 21 on the walls of the table faces 24, the

faces :25 ofthe-bushingli). 1 v

' When these drive members are nested or assembled, as shown, with the said fiat contacting faces engaging,

In order to the said members, means must be provided. These means constitute an important and As illustrated and as preferred, each bushmg or spider: member is provided with one 'or more locking or latch members disposed Bushirfg 18 is formed with faces 22 with additional contact faces as above stated, the

of substantially the same construction. As

shown, these locking members each include a slidable body portion 30, formed with spring receiving openings'31, having springs 32 entered therein, vertically extending pin 5 receiving open ngs 33 adapted to receive s ring abutment pins 35.- In addition to t iese parts, the locking meansof members 17 and 18 have'vertical extending openings 34 adapted to receive locking ins 36.

In order to receive the loc i'ng members, springs and pins, the respective bushing members 17,18 and 19 are formed with hor i zontally extending openings 17 and vertically extending openings 17 and 17; .18,

18 and 18; and 19' and 19", into which the said locking members 30, and the said pin members 35 and 36 are placed; no locking pin 36 being necessary for the locking means carried by bushing 19.

When the bushing member 17 is positioned in the table, its locking members are designed to engage shoulders a formed on the table, maintained in the locked position when t bushings-have been removed for the inser-' tion of slips, not; shown,-'b.y, means of the locking pins 36. Locking memberSBQ of the bushing 17, it will be noted, project fora. slight distance into the bore of the said bushing, see Fig. 3. These projecting ends will be engaged by the bushing 18 when the latspider membersmay be automatically locked against vertical movement by merely positionlng an inner bushing within an outer one. Bushing 17 is formed with recesses 03 to i receive the locking members of bushing 18,

1 and bushing 18, in turn, is formed with recesses e to receive'the locking members car ried by the drill stern engaging bushing 19.

In the driving bushing member 18, I have shown an inclined opening h leading to a recess e of that -member,,the opening being provided to permit a pin to be' inserted to move the locking members. of bushing 19 out" of the recesses in bushing 18-When it is (le sired to remove the said bushing 19.;

It will be understood that when the'several bushingsare assembled as shown'by Fig, 2, it will-not be necessary to insert the look-- ingpins 36, in order to maintain the bushings in locked positions, the pins 36 being employed only whenit is desired to lift the inner bushing or the inner and intermediate bushings from thetable for the purpose of introducingpipeengaging slips into the space from which the bushings were'taken. It will be further noted that a removal of the inner bushing will automaticallyrelease the locking means of the intermediate bushingfrom-the outerbushing, and a removal of the intermediate bushing will release the lockingmeans between the outer bushing and the table. v

, What I claim is: v

1. In a rotary drilling machine, a rotary table having a bore, a bushing nested-there'- in, andautomatically operable locking meansfor locking the table and bushing against relative vertical movement characterized in that the locking means are actuated to lock said members together by positioning a member within the bushing.

2. In a rotary drilling machine, a romeans are moved to locked position when an inner drive member is placed in within an outer drive member.

3. In a rotarydrilling machine, a rotary table having a bore, an inner and an outer position drive bushing nested in-the bore, automatically operable locking means carried by the outer bushing and coacting with the table for preventing relative verticalmovement therebetween, saidlocking means constructed andarrangedto be actuated by positioning the inner 'bnshingmember Within the outer bushing member; I

machine, a rotary 4. In a rotary drilling table having a bore, a pluralityof drive bushings nested in thebore, said'bushings having coacting lockin'gfmeans for prevent- :ing relative vertical {mg ement within the bore, said lockingmeansarranged and con-I structed to beactuatedby pos1t1on1ng one bushing within another; I I

5. In a rotary" drilling'machine, arotary table having a bore, 'abplnrality of drive bushings nested in the bore, said'bushings having coacting locking-means for preventing relative vertical,movement within the bore, said locking means arranged and constructed to be actuated by positioning one bushing within another and" including a spring pressed slidable member.

6. .In a rotary drilling machine, a rotary table having a -bore,f-a bushing positioned in the bore, and automatically operable means for locking the table and bushing and releasing the same, characterized in that the locking means are actuated to lock said members together by positioning a member within the bushing and are released by withdrawing said member from the bushing.

' In testimony whereof I affix my signature.

EDGAR E. GREVE. 

